Effects of Dietary Protein and Fat Levels on Growth Performance, Nutrient Digestibility, Serum Indexes, and Rectal Fecal Microbiota of Sika Deer (Cervus nippon) Fawns in Early Wintering Period

Animals, Journal Year: 2025, Volume and Issue: 15(7), P. 908 - 908

Published: March 21, 2025

This study examined the effects of dietary crude protein (CP: 18%, 15%) and fat (EE: 8%, 4%) levels, their interactions, on growth performance, nutrient digestibility, serum indices, rectal fecal microbiota in sika deer fawns during early wintering. A two-month 2 × factorial experiment was conducted using 32 healthy five-month-old male randomly assigned to four groups: P18E8 (18% CP, 8% EE), P18E4 4% P15E8 (15% P15E4 EE). The group showed highest total weight gain average daily (p < 0.05), along with greater apparent digestibility dry matter, protein, calcium, fiber fractions 0.05). Serum urea content significantly lower this group, indicating improved nitrogen utilization Dominant at phylum level across all groups included Firmicutes_A Bacteroidota, showing a unique genus composition within known for enhancing digestion. In summary, diet 18% CP EE optimized gut composition, providing strategy improving health productivity overwintering.

Language: Английский

Changes in Climate and Their Implications for Cattle Nutrition and Management

Climate, Journal Year: 2024, Volume and Issue: 13(1), P. 1 - 1

Published: Dec. 24, 2024

Climate change is a global challenge that impacts rangeland and pastureland landscapes by inducing shifts in temperature variability, precipitation patterns, extreme weather events. These changes alter soil plant conditions, reducing forage availability chemical composition leading to nutritional stress cattle. This occurs when animals lack adequate water feed sources or these resources are insufficient quantity, composition, nutrient balance. Several strategies essential address impacts. Genetic selection, epigenetic biomarkers, exploration of memories present promising avenues for enhancing the resilience cattle populations improving adaptation environmental stresses. Remote sensing GIS technologies assist locating wet spots establish islands diversity high quality grazing amid ongoing climate challenges. Establishing functional improves quality, reduces carbon nitrogen footprints, provides nutrients bioactives, thus health, welfare, productivity. Real-time GPS collars coupled with accelerometers provide detailed data on movement activity, aiding livestock nutrition management while mitigating heat stress. Integrating may offer significant advantages facing changing world securing future production food system.

Language: Английский